1/5单选题
难度：
1.
一元二次方程
（a≠0）的两个根互为相反数，则b满足（ ）
| A | 大于0 |
| B | 小于0 |
| C | 等于0 |
| D | 大于0或小于0 |
正确答案：Qw==
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
有两异号实数根的条件是（ ）
的两根分别为
，
，则
的关系是（ ）
有一正根和一个负根，且负根的绝对值较大的条件是（ ）